KAL-D
page 10
KAL-D K03/0516
b) Measuring range (span) adjustment
The flow monitor is set at the factory for the greatest possible range of flow
speed (2 m/s). At lower flow speeds, not all 8 LEDs will illuminate. To achieve
finer monitoring resolution, the measuring range can be adjusted to better fit the
actual flow speed.
Rotate the potentiometer clockwise as far as it will go (to the right-hand stop).
The extreme right-hand LED in the LED bargraph will blink. Set the desired
maximum system flowrate.
Now press the SET button. The DUAL LED blinks green.
Do not make any changes (potentiometer setting, etc.) while the DUAL LED
is blinking. This adjustment phase will last approx. 5-15 sec.
The span adjustment procedure is now complete. The device now switches
automatically to the monitoring mode. This adjustment has set the device
measuring range so that it now extends across the entire LED bargraph at
the maximum system flow.
The adjustment procedure is now complete. It may be repeated as often as
necessary.
c) Measuring mode
After adjustment, the flow monitor is once again in measuring mode.
The flow is constantly monitored and the actual value of the flow speed is
displayed on the LED bargraph.
Switching point setting
The potentiometer is now used to set the switching point (threshold) of the flow
switch. The switching point is displayed as a blinking LED on the bargraph. If the
flow rate increases to the point that illuminated LEDs on the bargraph (actual flow
value) reaches the position of the blinking LED (setpoint), the flow monitor
switches over from ALARM to FLOW. This can be seen at the display: the DUAL
LED that was showing a steady red light now switches to a steady green light.
The output is also switched at the same time.
Slowly
blinking
switching point LED (setpoint)
actual flow < setpoint (no flow)
Alarm status
DUAL LED illuminated red
no LEDs lit = no flow
Slowly
blinking
switching point LED (setpoint)
actual flow < flow below set-point
Alarm status
light strip actual value
Actual flow below setpoint
DUAL LED illuminated red
